How can merge 3 arrays into a single associative array in PHP

Question

I have 3 arrays, just 7 elements in them each. Arrays are:

filename[]

title[]

description[]

I want to express and iterate through a single associative array for each of the data in the arrays above. filename can be the key value for the assoc array, but each filename has it's own corresponding title and description.

Below is a sample of:

var_dump($filename)
    string(10) "IMG_1676_3" [1]=> 
    string(10) "IMG_0539_3" [2]=> 
    string(8) "IMG_1942" [3]=> 
    string(8) "IMG_1782" [4]=> 
    string(8) "IMG_2114" [5]=> 
    string(8) "IMG_9759" [6]=> 
    string(8) "IMG_2210" }

var_dump($title)
    string(31) "Lighthouse at Ericeira Portugal" [1]=> 
    string(23) "Gaudi park in Barcelona" [2]=> 
    string(32) "Driving around outside of Lisbon" [3]=> 
    string(16) "Madeira Portugal" [4]=> 
    string(15) "Barcelona Spain" [5]=> 
    string(15) "Lisbon Portugal" [6]=> 
    string(14) "Sailing Lisbon" }

Answer 1

function mergeArrays($filenames, $titles, $descriptions) {
    $result = array();

    foreach ( $filenames as $key=>$name ) {
        $result[] = array( 'filename' => $name, 'title' => $titles[$key], 'descriptions' => $descriptions[ $key ] );
    }

    return $result;
}

Just make sure you pass valid input to the function, or add some extra checking. Is that what you're looking for?

Answer 2

If you array key are the same for all the 3 arrays, the better way to do what you are asking, is a foreach creating a new array with all the key(filename,title,description) in the same key:

<?php
foreach($filename as $key => $file)
{
    $files[$key]['filename'] = $file;
    $files[$key]['title'] = $title[$key];
    $files[$key]['description'] = $description[$key];
}
?>